( ISD)
A European directive that allows certain businesses once authorised ( authorisation) in one part of the EEA to undertake investment services in another part of the EEA without the need for re-authorisation. Consequently, authorisation becomes "passportable". Note, however, that not all activities are passportable.
See core service and non-core and compare the definitions of instruments/ investments and investment business and investment services. Dresdner Kleinwort Wasserstein financial glossary
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The European Union Investment Services Directive, adopted in 1993, sought to establish the conditions in which authorised investment firms and banks could provide specified services in other European Union Member States on the basis of home country authorisation and supervision. It has subsequently been extended by the Markets in Financial Instruments Directive. Exchange Handbook Glossary
Financial and business terms. 2012.